[PATCH] nvmem: stm32-romem: mark OF related data as maybe unused

[Krzysztof Kozlowski]

The driver can be compile tested with !CONFIG_OF making certain data
unused:

  drivers/nvmem/stm32-romem.c:271:34: error: ‘stm32_romem_of_match’ defined but not used [-Werror=unused-const-variable=]

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
---
 drivers/nvmem/stm32-romem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvmem/stm32-romem.c b/drivers/nvmem/stm32-romem.c
index ba779e26937a..38d0bf557129 100644
--- a/drivers/nvmem/stm32-romem.c
+++ b/drivers/nvmem/stm32-romem.c
@@ -268,7 +268,7 @@ static const struct stm32_romem_cfg stm32mp13_bsec_cfg = {
 	.ta = true,
 };
 
-static const struct of_device_id stm32_romem_of_match[] = {
+static const struct of_device_id stm32_romem_of_match[] __maybe_unused = {
 	{ .compatible = "st,stm32f4-otp", }, {
 		.compatible = "st,stm32mp15-bsec",
 		.data = (void *)&stm32mp15_bsec_cfg,
-- 
2.34.1